27 lines
758 B
C
27 lines
758 B
C
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#include <stdint.h>
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#include "user_proc.h"
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//绘制十字交叉线
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void draw_cross(GrayImage *img, int x, int y, int size, uint8_t color){
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if(!img || !img->data) return;
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//获取图像宽度和高度
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int w = img->width;
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int h = img->height;
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if(x<0 || x>=w || y<0 || y>=h) return;
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//定义一个二维数组指针方便访问像素
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uint8_t **image = img->rows;
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for(int dx=-size;dx<=size;dx++){
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int nx = x + dx;
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if(nx>=0 && nx<w){
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image[y][nx] = color;
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}
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}
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for(int dy=-size;dy<=size;dy++){
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int ny = y + dy;
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if(ny>=0 && ny<h){
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image[ny][x] = color;
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}
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}
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}
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void img_proc(GrayImage *img){
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draw_cross(img, img->width/2, img->height/2, 20, 0);
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}
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